Feed mechanism for wood-pulp mills



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A. W. PRIEST. Feed Mechanism for Wood-Pulp Mills. No. 228,477. Patented June 8,1880.

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, A. W. PRIEST. Peed Mechanism for Wood-Pulp Mills. No. 228,477. Patented June 8,1889.

UNTTED STATES ATENT T rrent FEED MECHANISM FOR WOOD-PULP NHLLS.

SPECIFICATION forming part of Letters Patent No. 228,477, dated. June 8, 1880.

Application filed April 8, 1880. (No model.)

To all whom it may concern Be it known that I, A. W. PRIEST, of Kaukauna, in the county of Outagamie and State of Wisconsin, have invented certain new and useful Improvements in Feed Mechanism for Vood-Pulp Mills; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 is a side elevation of my improved machine. Fig. 2 is a top or plan view. Fig. 3 is a longitudinal vertical section on line 00 a: of Fig. 2. Fig. at is a perspective view of the curved bed.

The same part is marked by the same letter of reference wherever it occurs in the drawings.

The object of this invention is to provide a continuouslyoperating automatic feed to supply wood to the grindstone of a wood-pulping machine; and the invention consists in placing near the surface of the stone twoor more.

wood-receiving cells, each having a separate hopper and provided with a hinged bed or presser operated by a cam on the face of a rotatin g disk driven by worm-gearing actuated by connection with the grindstone-shaft, the cells being charged and the pressers operating alternately or in succession, so that the reduction of the wood is continuously going on at all times on some portion of the face of the grindstone, the rate of feed being regulated by the speed of the reducing-surface, all as hereinafter more specifically set forth.

In the accompanying drawings, A marks the frame of the machine, which supports the working parts and'incloses a water-tank, T, in which rotates, on shaft S, the grindstone G, for reducing the wood to pulp. Near the front face of this stone a pair of cells, L L, are ad- 4 5 justably attached by means of slots and binding-nuts a a to the top of the frame, as shown in Fig. 2. V marks the rear wall of these cells. They are open on the rear side, next the stone Gr. Above each cell is placed a hopper, J, from which it is supplied with the wood to be pulped, which has been previously reduced to the proper size and length and laid in the hoppers. In each cell is hinged at h a curved 'bed or presser, K, which has an oscillating movement 011 said hinge toward and from the stone Gr. To the back of each presser K is attached an arm, F, the end of which rests on a spiral cam, 0, located around the periphery of a rotary disk, Y, attached to the upper end of the inclined shaft D, which is stepped on the lower part of the frame, as shown in Fig. 3.

The grindstone-shaft S is driven by a band from any suitable prime mover applied to pulley M. On the said shaft is a smaller pulley, Z, connected by a band to pulley N on the end of shaft X. A worm pinion or screw, P, on this shaft engages with a large worm-wheel, W, attached to the inclined shaft D, on the upper end of which is the disk Y and its inclined spiral cam O. This cam is an inclined plane up which the arms F successively travel as the disk rotates, until they reach the highest point, a, above the face of the disk, when they fall to the lowest point on the surface of the cam, each arm being half-way up the incline when its predecessor has reached the top and is ready to fall.

The operation is as follows: WVood properly prepared is fed to the cells L and the hoppers J until both are filled. The grindstone Gr is then set in motion in the direction indicated by the arrow. Its revolution imparts rotation to the disk-shaft D, and as the arm F of either of the pressers K rides up on the cam it causes the pressers to apply the wood to the reducing-surface of stone G. When the arm F passes the highest point, a, of cam O the presser is at the nearest point to the surface of the stone. The arm 1* then falls, and the presser K falls back to receive a fresh charge of wood, which descends by gravity into it from the hopper J above. While one presser is thus receiving its charge the other presser is in full operation, its arm being half-way up the inclined face of the cam. The hoppers being kept full, the mechanical feed is automatic and continuous and is regulated in speed by the movement of the grindstone, from the shaft of which it derives its motive power. The com minuted material falls from the cells into the tank and receives the usual after-treatment for conversion into paper.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

The automatic eontin uous-feedin g device for 5 a Wood-pulp mill hcreinbeforc described, the same consisting in the combination, with the grindstone or reducing-Wheel of the mill, of the hoppers J cells L pressers K, cam 0, disk Y, shaft D worm-wheel and screw-shaft 10 X, the last named being driven by the shaft S of the grindstone, the Whole eoi'lstructed, arranged and operating in the manner and for the purpose specified.

In testimony that I claim the foregoing as my own invention I aflix my signature in 15 presence of two Witnesses.

ALBERT V. PRIEST.

\Vitnesses:

W. H. GRAVES, J. W. McKIssoN. 

